The North Wales Rivers Trust has been actively restoring riparian habitat at the Afon Eden site through native deciduous tree planting and the creation of invertebrate habitat by fencing out livestock. These efforts are vital for establishing a healthy ecosystem within the 10-meter riparian zone, providing essential food sources for both local wildlife and aquatic life in the river.

Recently, we conducted a sweep net field survey of the newly created bug habitats and were thrilled to observe a wide variety of species. These positive results confirm that our restoration efforts are making a significant impact on the site's ecological health.

What is a riparian zone?

The riparian zone is classed as the area immediately adjacent to fresh running water. This transitional piece of land plays a vital role in the ecology and biodiversity of the river. The “riparian buffer zone” is classed as the land from the river / stream to 10 meters inwards.

Why are healthy and diverse riparian zones beneficial to the river?

1. Erosion Control
   Riparian zones are essential for stabilising riverbanks and preventing erosion. At our Afon Eden site, we’ve planted over 200 native trees along the riverbank. These trees provide shade, helping to regulate water temperature, while their leaves and insects become food for aquatic life. Even after they die, the decaying wood offers habitat for invertebrates, which in turn support fish and other aquatic species. Fallen branches can trap sediment, aiding in the natural restoration of riverbanks as the sediment accumulates and becomes vegetated. Additionally, trees act as barriers, absorbing excess nutrients and agricultural runoff, preventing them from entering the river.

2. Habitat and Biodiversity
Riparian buffer zones provide crucial habitat for a wide range of wildlife, including fish, birds, insects, and mammals. These areas support diverse plant communities, contributing to the overall biodiversity of the river ecosystem.

3. Water Quality Improvement
Riparian zones act as natural filters, trapping sediments, nutrients, and pollutants before they can reach the river. This filtration process reduces the amount of contaminants entering the water, leading to cleaner and healthier rivers.

If you would like to volunteer on our Afon Eden site please email poppy@northwalesrivertrust.org

This work is part of the Freshwater Pearl Mussel project funded by Eryri National Park in partnership with Welsh Government and Local Nature Partnerships.

Written by Simone Williams